Asteroid 7 Iris
Asteroid 7 Iris Sky Charts and Coordinates
This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations.
More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.
High Precision Live Sky Chart
Asteroid 7 Iris Rise and Set Times
Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.
Asteroid 7 Iris Orbit Diagram
This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!
View Asteroid 7 Iris in the 3D Solar System Simulator
Asteroid 7 Iris Ephemeris
The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.
| Date | Right AscensionR.A. | DeclinationDec. | MagnitudeMag | Constellation |
|---|---|---|---|---|
| 2018 Sep 18 | 10h 36m 32s | +04° 41’ 21” | 10.58 | Sextans |
| 2018 Sep 19 | 10h 38m 12s | +04° 30’ 39” | 10.59 | Sextans |
| 2018 Sep 20 | 10h 39m 51s | +04° 19’ 56” | 10.60 | Sextans |
| 2018 Sep 21 | 10h 41m 30s | +04° 09’ 14” | 10.61 | Sextans |
| 2018 Sep 22 | 10h 43m 10s | +03° 58’ 30” | 10.62 | Sextans |
| 2018 Sep 23 | 10h 44m 49s | +03° 47’ 45” | 10.63 | Sextans |
| 2018 Sep 24 | 10h 46m 27s | +03° 37’ 00” | 10.64 | Sextans |
| 2018 Sep 25 | 10h 48m 06s | +03° 26’ 16” | 10.65 | Sextans |
| 2018 Sep 26 | 10h 49m 45s | +03° 15’ 30” | 10.66 | Sextans |
| 2018 Sep 27 | 10h 51m 21s | +03° 04’ 45” | 10.67 | Sextans |
| 2018 Sep 28 | 10h 52m 59s | +02° 53’ 59” | 10.68 | Leo |
| 2018 Sep 29 | 10h 54m 37s | +02° 43’ 14” | 10.69 | Leo |
| 2018 Sep 30 | 10h 56m 13s | +02° 32’ 29” | 10.70 | Leo |
| 2018 Oct 01 | 10h 57m 51s | +02° 21’ 42” | 10.70 | Leo |
Distance of Asteroid 7 Iris from Earth
The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.
The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.
Light Curve of Asteroid 7 Iris
The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.
Asteroid 7 Iris Physical Data
The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database
| Physical Parameter | Value | Relative to Earth |
|---|---|---|
| Diameter | 199.83 km | 0.0157 |
| Sideral Rotation | 7.1390 hours | 0.2983 |
| Absolute Magnitude | 5.51 | |
| Geometric Albedo | 0.2766 | |
Asteroid 7 Iris Orbital Elements
The following table lists the orbital elements of Asteroid 7 Iris at epoch 22 March 2018 00:00 UTC (JD: 2458200.5). Source: JPL Small-Body Database
| Element | Symbol | Value |
|---|---|---|
| Orbit eccentricity | e | 0.23139770 |
| Orbit inclination | i | 5.52348949° |
| Perihelion distance | q | 1.83359509 AU 274,301,922 km |
| Aphelion distance | Q |
2.93765028 AU 439,466,228 km |
| Semi-major axis | a |
2.38562269 AU 356,884,075 km |
| Orbital period | period |
3.6800 years 1,345.8636 days |
| Date of perihelion transit | Tp | 2017-Nov-18 07:20:28 2,458,075.8059 JD |
| Next perihelion transit | 2021-Jul-26 04:04 2,459,421.6695 JD |
|
| Argument of perihelion | peri | 145.30147448543° |
| Longitude of the ascending node | node | 259.56236737775° |
| Mean anomaly | M | 33.353958879952° |
| Mean motion | n | 0.26748624°/day |
| Closest approach to Earth* | 2017-Oct-31 | |
| Distance of closest approach* | 0.84895471 AU 127,001,816 km |
|
* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.